| 1. | The hydraulic efficiency of an impulse turbine is the ? | |
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ratio of the actual power produced by the turbine to the energy actually supplied by the turbine
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ratio of the actual work available at the turbine to the energy imparted to the wheel
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ratio of the work done on the wheel to the energy of the jet
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none of the above
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Report Question| 2. | A Pelton wheel is ? | |
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tangential flow impulse turbine
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inward flow impulse turbine
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outward flow impulse turbine
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inward flow reaction turbine
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| 3. | The undershot water wheels are those in which ? | |
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the wheel runs entirely by the weight of water
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the wheel runs entirely by the impulse of water
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the wheel runs partly by the weight of water and partly by the impulse of water
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none of the above
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| 4. | The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is ......... of the jet velocity ? | |
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one-fourth
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one-half
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three-fourth
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double
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| 5. | Which of the following is not an impulse turbine ? | |
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Girad turbine
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Turgo turbine
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Pelton wheel
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Kaplan turbine
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| 6. | In a reaction turbine, the draft tube is used ? | |
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to run the turbine full
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to prevent air to enter the turbine
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to increase the head of water by an amount equal to the height of the runner outlet above the tail race
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to transport water to downstream
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| 7. | In a Kaplan turbine runner, the number of blades are generally between ? | |
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2 to 4
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4 to 8
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8 to 16
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16 to 24
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| 8. | The runaway speed of a hydraulic turbine is the speed ? | |
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at full load
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at which there will be no damage to the runner
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corresponding to maximum overload permissible
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at which the turbine will run freely without load
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| 9. | The flow ratio of Francis turbine is defined as the ratio of the ? | |
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velocity of flow at inlet to the theoretical jet velocity
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theoretical velocity of jet to the velocity of flow at inlet
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velocity of runner at inlet to the velocity of flow at inlet
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none of the above
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| 10. | Which of the following statement is correct ? | |
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In an impulse turbine, the water impinges on the buckets with pressure energy
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In a reaction turbine, the water glides over the moving vanes with kinetic energy
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In an impulse turbine, the pressure of the flowing water remains unchanged and is equal to atmospheric pressure
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In a reaction turbine, the pressure of the flowing water increases after gliding over the vanes
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